HY57V56420(L)T
4Banks x 16M x 4Bit Synchronous DRAM
DESCRIPTION
The HY57V56420T is a 268,435,456bit CMOS Synchronous DRAM, ideally suited for the main memory applications
which require large memory density and high bandwidth. HY57V56420 is organized as 4 banks of 16,777,216x4.
The HY57V56420T is offering fully synchronous operation referenced to a positive edge of the clock. All inputs and out-
puts are synchronized with the rising edge of the clock input. The data paths are internally pipelined to achieve very
high bandwidth. All input and output voltage levels are compatible with LVTTL.
Programmable options include the length of pipeline ( CAS latency of 2 or 3), the number of consecutive read or write
cycles initiated by a single control command (Burst length of 1,2,4,8 or full page), and the burst count
sequence(sequential or interleave). A burst of read or write cycles in progress can be terminated by a burst terminate
command or can be interrupted and replaced by a new burst read or write command on any cycle. (This pipelined
design is not restricted by a `2N` rule.)
FEATURES
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Single 3.3V ± 0.3V power supply
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Auto refresh and self refresh
All device pins are compatible with LVTTL interface
8192 refresh cycles / 64ms
JEDEC standard 400mil 54pin TSOP-II with 0.8mm
of pin pitch
Programmable Burst Length and Burst Type
- 1, 2, 4, 8 and Full Page for Sequential Burst
- 1, 2, 4 and 8 for Interleave Burst
Programmable CAS Latency ; 2, 3 Clocks
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All inputs and outputs referenced to positive edge of
system clock
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Data mask function by DQM
Internal four banks operation
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ORDERING INFORMATION
Part No.
Clock Frequency
Power
Organization
Interface
Package
HY57V56420T-HP
HY57V56420T-H
HY57V56420T-8
HY57V56420T-P
HY57V56420T-S
HY57V56420LT-HP
HY57V56420LT-H
HY57V56420LT-8
HY57V56420LT-P
HY57V56420LT-S
133MHz
133MHz
125MHz
100MHz
100MHz
133MHz
133MHz
125MHz
100MHz
100MHz
Normal
4Banks x 4Mbits
x16
LVTTL
400mil 54pin TSOP II
Lower
Power
This document is a general product description and is subject to change without notice. Hynix Semiconductor Inc. does not assume
any responsibility for use of circuits described. No patent licenses are implied.
Rev. 1.8/Nov. 01